Overall
- Lewiston-Auburn
- 94.7
- Chicago-Naperville-Elgin
- 103.6
Diff +8.9 RPP
Lewiston-Auburn vs Chicago-Naperville-Elgin
Cost of living comparison based on BEA Regional Price Parities. Chicago-Naperville-Elgin is 9.4% more expensive than Lewiston-Auburn.
9.4% more expensive
Chicago-Naperville-Elgin, IL-IN is 9.4% more expensive than Lewiston-Auburn, ME on BEA Regional Price Parities (overall RPP 103.6 vs 94.7). A $100,000 salary in Lewiston-Auburn buys about the same as $109,351 in Chicago-Naperville-Elgin; the largest component gap is services.
- Overall RPP 94.7 (Lewiston-Auburn) vs 103.6 (Chicago-Naperville-Elgin)
- $100k in Lewiston-Auburn ≈ $109,351 purchasing power in Chicago-Naperville-Elgin
- Services drives the gap (-50.8 RPP points)
RPP parity plate
Pair ME:IL 94.7→103.6
TIER-GAP · CROSS-STATE · SPLIT-BUDGET · BENCH-CROSS · PP-SHIFT
- TIER-GAP Clear tier gap
- CROSS-STATE ME × IL
- SPLIT-BUDGET Split budget
- BENCH-CROSS Benchmark cross
- PP-SHIFT PP shift
Instrument codes from this pair's BEA Regional Price Parities (overall · goods · services · rents · national benchmark 100 · purchasing-power conversion), not a ranking or recommendation.
Category Breakdown
Goods
- Lewiston-Auburn
- 97.2
- Chicago-Naperville-Elgin
- 107.3
Diff +10.1 RPP
Services
- Lewiston-Auburn
- 134.4
Diff -50.8 RPP
Rents
- Lewiston-Auburn
- 69.0
- Chicago-Naperville-Elgin
- 112.0
Diff +43.0 RPP
| Category | Lewiston-Auburn | Chicago-Naperville-Elgin | Difference |
|---|---|---|---|
| Overall | 94.7 | 103.6 | +8.9 |
| Goods | 97.2 | 107.3 | +10.1 |
| Services | 134.4 | 83.6 | -50.8 |
| Rents | 69.0 | 112.0 | +43.0 |
Visual Comparison
Overall
Lewiston-Auburn 94.7
Chicago-Naperville-Elgin 103.6
Goods
Lewiston-Auburn 97.2
Chicago-Naperville-Elgin 107.3
Services
Lewiston-Auburn 134.4
Chicago-Naperville-Elgin 83.6
Rents
Lewiston-Auburn 69.0
Chicago-Naperville-Elgin 112.0
Vertical line = national average (100)
What This Comparison Actually Tells You
Services creates the largest separation: Chicago-Naperville-Elgin is 50.8 points lower. But services move against the overall direction, so this is a split budget rather than a clean across-the-board winner.
Lewiston-Auburn, ME and Chicago-Naperville-Elgin, IL-IN sit in clearly different price tiers, separated by 8.9 RPP points. At this distance, treating the same nominal salary as equivalent would materially change purchasing power.
This route crosses the national benchmark: Chicago-Naperville-Elgin is above 100 while Lewiston-Auburn is below it. That makes the move a change of price regime, not merely a rank swap.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
For a service-heavy household, test childcare, health, and other locally supplied costs before relying on rent alone. The BEA ratio converts $100,000 in Lewiston-Auburn to $109,351 in Chicago-Naperville-Elgin, but it is not a personal spending weight.
Lewiston-Auburn
94.7
Cost Index
Chicago-Naperville-Elgin
103.6
Cost Index
Salary Equivalents
What a salary in Lewiston-Auburn would need to be in Chicago-Naperville-Elgin for the same purchasing power:
| In Lewiston-Auburn | In Chicago-Naperville-Elgin | Difference |
|---|---|---|
| $50,000 | $54,676 | +$4,676 |
| $75,000 | $82,013 | +$7,013 |
| $100,000 | $109,351 | +$9,351 |
| $150,000 | $164,027 | +$14,027 |
$ in Lewiston-Auburn = in Chicago-Naperville-Elgin
Same BEA Regional Price Parity ratio as the table above (94.7 → 103.6), computed live from your number, nothing is sent anywhere.
How the Price Gap Changed
Lewiston-Auburn and Chicago-Naperville-Elgin share 17 published annual releases from 2008 through 2024. Their overall gap widened, moving from 7.7 to 8.9 RPP points. Chicago-Naperville-Elgin remained the higher-index metro in the latest release.
Services changed the most within this pair: its gap moved 9.0 points between the first and latest shared releases (41.8 to 50.8 points). This describes a relative price-index history, not a forecast or a household budget.
| Release Year | Lewiston-Auburn RPP | Chicago-Naperville-Elgin RPP | Relative Gap |
|---|---|---|---|
| 2008 | 97.7 | 105.4 | 7.7 points Chicago-Naperville-Elgin higher |
| 2012 | 98.8 | 105.1 | 6.4 points Chicago-Naperville-Elgin higher |
| 2016 | 96.6 | 103.8 | 7.2 points Chicago-Naperville-Elgin higher |
| 2020 | 99.7 | 104.5 | 4.8 points Chicago-Naperville-Elgin higher |
| 2024 | 94.7 | 103.6 | 8.9 points Chicago-Naperville-Elgin higher |
Annual BEA Regional Price Parity releases; a higher index means a higher price level relative to the national average of 100. Selected years shown from the full shared series.
Frequently Asked Questions
Is Chicago-Naperville-Elgin more expensive than Lewiston-Auburn?
Chicago-Naperville-Elgin is 9.4% more expensive than Lewiston-Auburn. The overall cost index is 103.6 vs 94.7 (national average = 100).
What salary in Chicago-Naperville-Elgin equals $100K in Lewiston-Auburn?
A $100,000 salary in Lewiston-Auburn has the same purchasing power as $109,351 in Chicago-Naperville-Elgin. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Lewiston-Auburn and Chicago-Naperville-Elgin?
Rents in Lewiston-Auburn are indexed at 69.0 while Chicago-Naperville-Elgin is at 112.0 (national average = 100). Chicago-Naperville-Elgin has higher rents.
Data sources
- BEA Regional Price Parities (RPP), the cost-of-living indices shown on this page
- U.S. Census Bureau, American Community Survey (ACS), gross-rent observations behind the rents component
- BLS Consumer Price Index (CPI), goods and services price relatives
- BLS Occupational Employment and Wage Statistics (OEWS), labor-driven services component
- HUD Fair Market Rents (FMR), 40th-percentile rent cross-reference
Every figure on PlainCost is rendered directly from BEA Regional Price Parity source data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, our changelog, or report a data error. Data current as of 2026-08-11. Rankings measure the published cost-of-living index only; we don't recommend where to live or rate any metro's quality of life.